import sys
import ctypes
import time

EnumWindows         = ctypes.windll.user32.EnumWindows
EnumChildWindows    = ctypes.windll.user32.EnumChildWindows
EnumWindowsProc     = ctypes.WINFUNCTYPE(ctypes.c_bool, ctypes.POINTER(ctypes.c_int), ctypes.POINTER(ctypes.c_int))
GetWindowText       = ctypes.windll.user32.GetWindowTextW
GetWindowTextLength = ctypes.windll.user32.GetWindowTextLengthW
IsWindowVisible     = ctypes.windll.user32.IsWindowVisible
SendMessage         = ctypes.windll.user32.SendMessageW

def getWindowText(hwnd):
  length = GetWindowTextLength(hwnd)
  buffer = ctypes.create_unicode_buffer(length + 1)
  GetWindowText(hwnd, buffer, length + 1)
  return buffer.value
  
def match(title, text, exactMatch):
  match = False
  if exactMatch:
    if text == title:
      match = True
  else:
    if 0 < title.find(text):
      match = True
  return match

def search(text, exactMatch, parentHwnd=None):
  resultHwnd = []
  def enumProc(hwnd, lParam, text=text, exactMatch=exactMatch, resultHwnd=resultHwnd):
    title = getWindowText(hwnd)
    
    if match(title, text, exactMatch):
      resultHwnd.append(hwnd)
      return False
      
    return True
  
  if None == parentHwnd:
    EnumWindows(EnumWindowsProc(enumProc), 0)
    return resultHwnd
  else:
    EnumChildWindows(parentHwnd, EnumWindowsProc(enumProc), 0)
    return resultHwnd

def clickButtonByHwnd(buttonHwnd):
  SendMessage(buttonHwnd, 0x00F5, 0, 0) # 0x00F5 - BM_CLICK

def searchButton(windowTitle, buttonText):
  exactMatch = True
  for hwnd in search(windowTitle, exactMatch):
    for buttonHwnd in search(buttonText, exactMatch, hwnd):
      return buttonHwnd
  return None

# interval - in terms of second  
def timeIntervalCall(fn, interval):
  import time
  while True:
    fn()
    time.sleep(interval)

def clickButton(windowTitle, buttonText):
  print 'attempt to find button...'
  buttonHwnd = searchButton(windowTitle, buttonText)
  if None != buttonHwnd:
    print 'found'
    clickButtonByHwnd(buttonHwnd)
  else:
    print 'not found'

if __name__ == '__main__':
  if 4 > len(sys.argv):
    print 'not enough parameter'
    sys.exit()
    
  windowTitle = sys.argv[1]
  buttonText = sys.argv[2]
# interval - in term of second  
  interval = int(sys.argv[3])
  
  print 'title : %s' % windowTitle
  print 'button text : %s' % buttonText
  print 'time interval : %s' % interval
  print
  
  timeIntervalCall(lambda : clickButton(windowTitle, buttonText), interval)